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Expert:

If you're not sure how to protect against HPV, watch this video to learn about the vaccine used to protect against certain strains of HPV.

Transcript: In 2006, the FDA approved Gardasil, the first vaccine to protect against certain strains of the human...

In 2006, the FDA approved Gardasil, the first vaccine to protect against certain strains of the human papillomavirus, or HPV. Although there are over 100 strains of this virus, only about 40 are harmful. Gardasil protects against four specific strains of HPV, numbers 6 and 11, which cause 90 percent of genital warts cases, and numbers 16 and 18, which can lead to 70 percent of cervical cancers! Gardasil is approved for use in females between the ages of 9 and 26, although-since the virus is passed sexually-girls yet to have intercourse are the best candidates.